Why Do I Feel Sick After Looking At My Phone? | KOALAEYE OPTICAL

Why Do I Feel Sick After Looking At My Phone?

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Step-by-Step Glasses Size Guide

In this section, we will show you how to perform glasses measurements. But the first thing is to know what face shape you have. If you do not know, click here to have a check.

Then you need to know where to find the size measurement of your glasses. In general, you will find numbers that look like this 51-17-145 at the temples of your eyeglasses. Of course, these numbers come at different meanings.

The first number often refers to the lens width. Lens width is the horizontal diameter of the lens at its widest point. In optometry, another term is eye size.

The second number often means the bridge width. Bridge width is the part that joins the two lenses and sits over the nose. Some refer to this as the gap. The bridge width varies between 14 and 24 millimeters.

The third number often means the temple length. The temple is the arm that keeps the sunglasses on your face. That arm extends to the part that hangs on the ears. The length is usually 135, 140, or 145 millimeters.

Lens height measures the size of the lens vertically, that is from the top to the bottom of the lens. Although sizes may differ depending on the brand, the standard size is somewhere between 32 and 38 millimeters.


ShadyVEU HD blue light blocking Glasses

The anti-reflective yellow and amber lenses are the best choices for outdoor vision protection, as they reduce high-intensity glare from bright lights (headlights, LED signs, etc.) at night. They are suitable for daytime driving with a clear vision, especially in low light conditions such as rain, haze, and winter. Yellow and amber-colored lenses help block out our computer screens, smartphones, games consoles, tablets, and TVs, helping to prevent melatonin suppression and thus helping wearers fall asleep faster.

They are suitable for sports, hunting, fishing, cycling, work, practical and construction work, day driving, night driving, bright days, snow days, and low light conditions.



What Are Non-Prescription Glasses?

Nowadays, many people wear glasses for a variety of reasons and not just for vision problems. In fact, many people wear non-prescription glasses as a fashion statement. This trendy accessory can make you more fashionable.

What are non-prescription glasses? It is important to note that the non-prescription glasses have no corrective power, while non-prescription reading glasses offer some level of magnification, enlarging what you see up-close.

If you don’t have a vision problem, wearing Plano glasses shouldn’t be a problem since they will neither damage your eyes nor cause structural issues. Some non-prescription specs, such as the type that blocks damaging blue light, can actually be beneficial to your eye health.

What Are the Benefits of Non-Prescription Glasses?

In this part, we will show you the benefits of non-prescription glasses and show you what you need to know before buying the non-prescription glasses.

Protection: the non-prescription glasses would provide protection for your eyes from dust, direct sunlight, and computer radiation. In addition, these glasses would have to be enhanced with special coatings.

Fashion: Wearing non-prescription glasses enables you to look more fashionable. The best part is that you can select a pair of non-prescription glasses that have the features you prefer. Besides, many frames are made from high-quality materials that make them durable. They are comfortable and lightweight, which everyone can appreciate. Non-prescription glasses are also available in a variety of sizes, shapes, colors and styles so there will always be something that matches your needs and even your personality.


SaintShilan Titanium Rimless Flexible Frame

They are lightweight glasses with transparent titanium lenses. They have a soft silicone nose pad, with no pressure on the nose, ensuring the best comfort to wear! The environmentally-friendly IP electroplating rack -- SaintShilan focuses on high-quality electroplating, making you comfortable to wear at work and comfortable to read in daily life. They help improve vision and improve quality of life. They are always the best gifts to you and your family.



Is it true that green film prevents blue light?

Some lenses filter out harmful blue light by reflective multiplayer coating. The lens has a bright blue-violet coating. Green film anti-blue lens relies on the lens material itself to absorb blue light. Therefore, it is impossible to know if the lens can really block the blue light only by looking at the film layer. Instead, it is necessary to use the test equipment of blue light blocking rate or ask the manufacturer to provide relevant experimental data. There is no problem wearing an anti-blue lens unless the user has a high demand for color authenticity, like painters, graphic designers, etc. Because when using anti-blue glasses to see white blue objects, there will be a certain color deviation. It is up to the above workers to make their own decisions.


How can you tell if blue light glasses work?

It can be identified in the light. Ordinary lenses have a yellowish feeling under the reflection of light, while the anti-blue lens film color has blue on the yellow-green film, which is the cause of reflecting blue light out. Check the instruction manual to verify that the lenses contain radiation-resistant materials. When wearing, you can look at the electronic screen far away, and check if there is a sense of irritation to the eyes. The biggest difference between the regular lens and the anti-blue lens is the coating layer. If you look carefully, you can see that the anti-blue lens layer is very clear. Put the anti-blue light glasses on the fully open phone screen and observe if the covered area is blue. If it is, the prevention effect is good. This is because the blue light emitted by the phone is reflected on the phone screen by the lens.


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Select the lens.

The choice of lenses is one of the matters to note with glasses. Teenagers are active and often do sports. They can choose resin lenses, which are light, durable, and not broken. For some adolescents with complex refractive conditions, it is best to customize the lens in the case of the need for custom lenses, to get the perfect pair of glasses. Choose the refractive index that is right for you. The thickness of the edges of the lens is related to the size and shape of the frames in addition to the refractive index. The original state of the myopic lens is a circle that is thin in the middle and thick around, and then it is ground into the shape that suits the lens frame. If the thinnest center is relatively far from the edge of your frame, that is, if that frame is large, the edge of the lens will be thicker.

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